Micro passage cold plate device for a liquid cooling radiator

Abstract

A micro passage cold plate device for a liquid cooling radiator includes a upper cover and a lower plate. The upper cover has a working medium inlet at a side thereof and a working medium outlet at another side thereof. The inlet and outlet are trumpet-shaped such that the working medium expansively enters the cold plate gradually and leaves the cold plate with a reduced way gradually. Hence, the cold plate provides an even distribution of temperature, a lower thermal resistance and a better heat dissipation performance such that the stability of the two-state flow of the working medium is enhanced for heat dissipation device in the field of electronic field.

1 . A micro passage cold plate for a liquid cooling device comprising:
 an upper cover, wherein a side at a top thereof is disposed with a working medium inlet and another side thereof is disposed with a working medium outlet; and   a lower plate joined to said upper cover;   characterized in that said inlet and said outlet extend inward a trumpet-shaped portion respectively such that the working medium expansively enters said cold plate gradually and leaves said cold plate with a reduced way gradually.   
     
     
         2 . The micro passage cold plate for a liquid cooling device as defined in  claim 1 , wherein a liquid storage zone is disposed at said inlet, a vapor discharge zone is disposed at the outlet and a micro passage zone is disposed between said liquid storage zone and said vapor discharge zone. 
     
     
         3 . The micro passage cold plate for a liquid cooling device as defined in  claim 2 , wherein said liquid storage zone and said vapor discharge zone are a chamber respectively and said micro passage zone is a grid-shaped passage with said liquid storage zone having a nozzle structure to communicate with said micro passage zone and said vapor discharge zone having a straight through pipe structure to communicate with said micro passage zone. 
     
     
         4 . The micro passage cold plate for a liquid cooling device as defined in  claim 1 , wherein said lower plate and said upper cover are made of semiconductor material and bonded as a single piece, and said trumpet-shaped inlet and outlet are fabricated to be flush with said top surface of said upper cover. 
     
     
         5 . The micro passage cold plate for a liquid cooling device as defined in  claim 2 , wherein said lower plate and said upper cover are made of semiconductor material and bonded as a single piece, and said trumpet-shaped inlet and outlet are fabricated to be flush with said top surface of said upper cover. 
     
     
         6 . The micro passage cold plate for a liquid cooling device as defined in  claim 1 , wherein said lower plate and said upper cover are made of a metal and welded as a single piece of said cold plate; and said trumpet-shaped inlet and outlet are machined to extend outward the top surface of said upper cover. 
     
     
         7 . The micro passage cold plate for a liquid cooling device as defined in  claim 2 , wherein said lower plate and said upper cover are made of a metal and welded as a single piece of said cold plate; and said trumpet-shaped inlet and outlet are machined to extend outward the top surface of said upper cover. 
     
     
         8 . The micro passage cold plate for a liquid cooling device as defined in  claim 1 , wherein said lower plate, which is made of a metal, and said upper cover, which is made of a metal or nonmetal, engage with each other tightly with a plurality of screws; and said trumpet-shaped inlet and said trumpet-shaped outlet are fabricated with a plastics injection mold or machining to extend outward the top surface of said upper cover. 
     
     
         9 . The micro passage cold plate for a liquid cooling device as defined in  claim 1 , wherein said lower plate, which is made of a metal, and said upper cover, which is made of a metal or nonmetal, engage with each other tightly with a plurality of screws; and said trumpet-shaped inlet and said trumpet-shaped outlet are fabricated with a plastics injection mold or machining to extend outward the top surface of said upper cover. 
     
     
         10 . The micro passage cold plate for a liquid cooling device as defined in  claim 6 , wherein a O-ring seal is disposed between said upper cover and said lower plate. 
     
     
         11 . The micro passage cold plate for a liquid cooling device as defined in  claim 7 , wherein a O-ring seal is disposed between said upper cover and said lower plate.